Rules

The competition consists of 3 rounds. The competition is held over 2 weeks. TNumber of questions and the competetion time changed by stagehe ffirst round each day the contestants have four-and-a-half hours to solve three problems. Each problem is worth 7 points for a maximum total score of 42 points. Calculators are not allowed. Protractors are not allowed relatively recently.[10] The problems chosen are from various areas of secondary school mathematics, broadly classifiable as geometry, number theory, algebra, and combinatorics. They require no knowledge of higher mathematics such as calculus and analysis, and solutions are often elementary. However, they are usually disguised so as to make the solutions difficult. The problems given in the IMO are largely designed to require creativity and the ability to solve problems quickly. Thus, the prominently featured problems are algebraic inequalities, complex numbers, and construction-oriented geometrical problems, though in recent years, the latter has not been as popular as before because of the algorithmic use of theorems like Muirhead's Inequality, and Complex/Analytic Bash to solve problems.[11]

dhj

dhj

dhj